7. Place and compact all fill in loose lifts not exceeding 12 inches to the <br />standard specified above. Thinner lifts may be required if light or <br />hand-operated equipment is used. <br />8. Overexcavate all test pits that extend under buildings and pavements. <br />Replace the test pit backfill with Select Fill placed in maximum 12-inch <br />thick loose lifts and compact as specified above. The test pit locations <br />should be shown in the project plans for the contractor's reference for <br />future mitigation. <br />9.. Provide contractors with a copy of this report to review <br />recommendations for wet weather site preparation and foundation <br />construction, and the soil conditions encountered in the explorations. <br />We should be provided an opportunity to meet with the contractor prior <br />to construction to discuss the site conditions and the contractor's <br />approach to site preparation. <br />Site Preparation (Buildings) - Wet Weather <br />For wet weather construction, prepare the building pads as follows: <br />10. Strip the existing ground ±4 inches to remove all roots and sod. In <br />some areas, deeper stripping may be required to remove tree roots or <br />unsuitable topsoil. The stripping depth should accommodate a <br />minimum -24-inch thick building pad. Dispose of all strippings outside <br />of construction areas. <br />11. Stripping during wet weather should be completed in sections Ito <br />minimize exposure to weather) and with a hoe equipped with a smooth <br />bucket (to reduce disturbance of the subgrade).. The excavator should <br />operate from outside of the excavation or from a thickened rock section <br />extending into the excavation. Do not expose more subgrade than can <br />be covered with granular fill the same day and do not compact the <br />subgrade. Do not permit vehicles or construction equipment on the <br />subgrade unless they are supported on a minimum of - 24 inches of <br />compacted granular fill. <br />12. Overexcavate areas of unsuitable soil or fill that are exposed by the site <br />stripping. Fine-grained fill or fill that includes organic materials, <br />construction debris, or other deleterious materials should be disposed of <br />away from structures and paved areas. The reuse of any fine-grained <br />fill will not be practical during wet weather. Backfill overexcavated <br />areas beneath buildings with Granular Site Fill and/or Select Fill. <br />13. Place a Separation Geotextile on the excavated subgrade that meets the <br />requirements specified above. The geotextile should be laid smooth, <br />without wrinkles or folds in the direction of construction traffic. <br />Overlap adjacent rolls a minimum of 2 feet. Pin fabric overlaps or place <br />Oakleigh Meadows Cohousing February 12, 2013 <br />Geotechnical Investigation Project 2131004 1 453 <br />Eugene, Oregon 8. Willard C. Dixon Architect, LLC <br />